ETF Due Diligence: A 10-Point Checklist
Before buying any ETF, check these 10 things. Five minutes of due diligence prevents years of regret.
Don't have time? Here's what you need to know:
- 1Run this 10-point checklist before buying any unfamiliar ETF — 5 minutes prevents costly mistakes
- 2The most important checks: expense ratio, AUM, overlap with existing holdings, and clear benchmark
- 3For mainstream index ETFs (VTI, VOO, BND), all checks pass automatically
- 4If a fund fails on expense ratio, AUM, or overlap, look for an alternative
The 10-Point ETF Due Diligence Checklist
Not all ETFs are created equal. Use this checklist before adding any new fund to your portfolio — especially niche, thematic, or newly launched ETFs. For mainstream index funds (VTI, VOO, BND), most of these checks pass automatically. The checklist matters most for unfamiliar funds.
- 1. Expense ratio: Under 0.10% for core, under 0.50% for satellite?
- 2. AUM: Above $500 million for core, above $100 million for satellite?
- 3. Daily volume: Above 500,000 shares for core, above 100,000 for satellite?
- 4. Index tracked: Do you understand what the fund holds and why?
- 5. Top 10 holdings: Are they what you expect? Any surprising concentrations?
- 6. Overlap: How much of this fund do you already own through VTI?
- 7. Tracking difference: Within 0.10% of the benchmark annually?
- 8. Fund structure: Physical replication for core holdings?
- 9. Distribution history: Zero capital gains distributions for index funds?
- 10. Your portfolio need: Does this fund fill a specific gap or just add complexity?
Red Flags That Should Stop You
| Red Flag | Why It Matters | What to Do Instead |
|---|---|---|
| Expense ratio above 0.75% | Very high for an ETF — approaching mutual fund territory | Find a cheaper alternative tracking a similar index |
| AUM below $50 million | Significant closure risk | Use a larger, established fund |
| No clear benchmark | Hard to evaluate if the fund is performing well | Stick with transparent index-tracking funds |
| Capital gains distributions | Unusual for ETFs — suggests poor tax management | Use a different fund in the same category |
| Leverage or inverse structure | Guaranteed long-term losses from daily reset | Never hold these for more than one day |
| Top holding above 25% | Extreme concentration in one company | Ensure you are comfortable with single-stock risk |
Applying It in Practice
For VTI: expense ratio 0.03% ✓, AUM $350B+ ✓, volume 3M+ ✓, tracks CRSP Total Market ✓, top 10 are mega-caps ✓, zero overlap concern (it IS the core) ✓, tracking difference 0.02% ✓, physical ✓, zero capital gains ✓, fills core U.S. equity need ✓. Passes all 10 checks.
For a hypothetical 'AI Disruptors ETF': expense ratio 0.75% ❌, AUM $80M ⚠️, volume 30K ❌, tracks a proprietary index ⚠️, top holding is 12% ⚠️, overlaps 60% with QQQ ❌, no track record ❌. Fails 5+ checks — skip it.
Tip: If a fund fails 2 or more checks, look for an alternative. If it fails on expense ratio, AUM, or overlap, those are immediate disqualifiers for most investors.
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Frequently Asked Questions
Do I need to run this checklist for VTI or VOO?
No — these funds pass all 10 checks automatically. The checklist matters for unfamiliar funds, especially niche, thematic, or newly launched ETFs that you are considering as satellite positions.
What if a fund passes all checks except AUM?
AUM under $100 million is a risk factor. The fund might close within 2-3 years, forcing a taxable sale. If the fund uniquely fills a need, proceed with caution. If there is a larger alternative, use that instead.
How do I check overlap with my existing holdings?
Use ETF research tools like etfrc.com or your broker's ETF comparison tool. Enter your existing ETF and the new one — the tool shows percentage overlap. Above 50% overlap means you are mostly buying what you already own.
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.